tor crash on HUP only when SANDBOX is 1
Hi, I'm running an exit relay on a Debian Buster. I installed libseccomp and I've built tor 0.4.2.5 using debuild, like the wiki says. Today I noticed that tor crashes on HUP signal, only when the Sandbox option is on. I never had this problem. This is what my log says: an 05 08:23:10.000 [notice] Received reload signal (hup). Reloading config and resetting internal state. Jan 05 08:23:10.000 [notice] Read configuration file "/usr/share/tor/tor-service-defaults-torrc". Jan 05 08:23:10.000 [notice] Read configuration file "/etc/tor/torrc". Jan 05 08:23:10.000 [notice] Tor 0.4.2.5 opening log file. ============================================================ T= 1578205390 (Sandbox) Caught a bad syscall attempt (syscall dup) /usr/bin/tor(+0x1fc9fa)[0x561d896b29fa] /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f0bebf4bbc7] /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f0bebf4bbc7] /usr/bin/tor(tor_log_update_sigsafe_err_fds+0x18b)[0x561d896c699b] /usr/bin/tor(set_options+0x3c0)[0x561d89642f80] /usr/bin/tor(options_init_from_string+0x17d)[0x561d896453dd] /usr/bin/tor(options_init_from_torrc+0x404)[0x561d89645a74] /usr/bin/tor(+0x5f961)[0x561d89515961] /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(+0x22a6c)[0x7f0bec5a3a6c] /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(event_base_loop+0x5a7)[0x7f0bec5a4537] /usr/bin/tor(do_main_loop+0xff)[0x561d8952a3af] /usr/bin/tor(tor_run_main+0x1105)[0x561d89517d55] /usr/bin/tor(tor_main+0x3a)[0x561d8951523a] /usr/bin/tor(main+0x19)[0x561d89514df9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f0bebe8509b] /usr/bin/tor(_start+0x2a)[0x561d89514e4a] I'm telling you because i think it could be a bug, but I'm not sure that It's not caused by something else. At the moment I've disabled Sandbox. Please, let me know if I can fix this in some way, thanks.
just a little update: I've reproduced this bug on my laptop with Debian Buster. I've noticed that this problem occurs only with tor 0.4.2.5. Tor 0.4.1.6, from Debian buster backports repository, works properly. Il 05/01/20 07:43, tor-relay@riseup.net ha scritto:
Hi,
I'm running an exit relay on a Debian Buster. I installed libseccomp and I've built tor 0.4.2.5 using debuild, like the wiki says.
Today I noticed that tor crashes on HUP signal, only when the Sandbox option is on. I never had this problem.
This is what my log says:
an 05 08:23:10.000 [notice] Received reload signal (hup). Reloading config and resetting internal state. Jan 05 08:23:10.000 [notice] Read configuration file "/usr/share/tor/tor-service-defaults-torrc". Jan 05 08:23:10.000 [notice] Read configuration file "/etc/tor/torrc". Jan 05 08:23:10.000 [notice] Tor 0.4.2.5 opening log file.
============================================================ T= 1578205390 (Sandbox) Caught a bad syscall attempt (syscall dup) /usr/bin/tor(+0x1fc9fa)[0x561d896b29fa] /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f0bebf4bbc7] /lib/x86_64-linux-gnu/libc.so.6(dup+0x7)[0x7f0bebf4bbc7] /usr/bin/tor(tor_log_update_sigsafe_err_fds+0x18b)[0x561d896c699b] /usr/bin/tor(set_options+0x3c0)[0x561d89642f80] /usr/bin/tor(options_init_from_string+0x17d)[0x561d896453dd] /usr/bin/tor(options_init_from_torrc+0x404)[0x561d89645a74] /usr/bin/tor(+0x5f961)[0x561d89515961] /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(+0x22a6c)[0x7f0bec5a3a6c] /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6(event_base_loop+0x5a7)[0x7f0bec5a4537]
/usr/bin/tor(do_main_loop+0xff)[0x561d8952a3af] /usr/bin/tor(tor_run_main+0x1105)[0x561d89517d55] /usr/bin/tor(tor_main+0x3a)[0x561d8951523a] /usr/bin/tor(main+0x19)[0x561d89514df9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xeb)[0x7f0bebe8509b] /usr/bin/tor(_start+0x2a)[0x561d89514e4a]
I'm telling you because i think it could be a bug, but I'm not sure that It's not caused by something else.
At the moment I've disabled Sandbox. Please, let me know if I can fix this in some way, thanks.
On Sun, Jan 05, 2020 at 08:18:53AM +0100, tor-relay@riseup.net wrote:
just a little update:
I've reproduced this bug on my laptop with Debian Buster.
I've noticed that this problem occurs only with tor 0.4.2.5. Tor 0.4.1.6, from Debian buster backports repository, works properly.
Hi! Yes, this is ticket https://bugs.torproject.org/32841 I am hoping that when folks get back from their holidays, this will be one of the tickets they get to quickly. Thanks, --Roger
Hi, This doesn't look like 32841 to me. The crash appears to be caused by a call to dup() newly added in 0.4.2.x [1]. I'm having trouble reproducing the issue though. The code appears to handle log output. Do you have any custom 'Log' configurations in your torrc? Regards Peter [1]: https://gitweb.torproject.org/tor.git/commit/?id=a22fbab98690f802ae3bda27607... Roger Dingledine:
On Sun, Jan 05, 2020 at 08:18:53AM +0100, tor-relay@riseup.net wrote:
just a little update:
I've reproduced this bug on my laptop with Debian Buster.
I've noticed that this problem occurs only with tor 0.4.2.5. Tor 0.4.1.6, from Debian buster backports repository, works properly.
Hi! Yes, this is ticket https://bugs.torproject.org/32841
I am hoping that when folks get back from their holidays, this will be one of the tickets they get to quickly.
Thanks, --Roger
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Hi, FYI, a fix for this will be released as part of 0.4.2.6 and 0.4.1.8 (only 0.4.1.7 was affected in the 0.4.1.x series). See https://trac.torproject.org/projects/tor/ticket/32841 Regards Peter Peter Gerber:
Hi,
This doesn't look like 32841 to me. The crash appears to be caused by a call to dup() newly added in 0.4.2.x [1]. I'm having trouble reproducing the issue though. The code appears to handle log output. Do you have any custom 'Log' configurations in your torrc?
Regards
Peter
[1]: https://gitweb.torproject.org/tor.git/commit/?id=a22fbab98690f802ae3bda27607...
Roger Dingledine:
On Sun, Jan 05, 2020 at 08:18:53AM +0100, tor-relay@riseup.net wrote:
just a little update:
I've reproduced this bug on my laptop with Debian Buster.
I've noticed that this problem occurs only with tor 0.4.2.5. Tor 0.4.1.6, from Debian buster backports repository, works properly.
Hi! Yes, this is ticket https://bugs.torproject.org/32841
I am hoping that when folks get back from their holidays, this will be one of the tickets they get to quickly.
Thanks, --Roger
_______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
_______________________________________________ tor-relays mailing list tor-relays@lists.torproject.org https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-relays
On 1/5/20 7:43 AM, tor-relay@riseup.net wrote:
Hi,
I'm running an exit relay on a Debian Buster. I installed libseccomp and I've built tor 0.4.2.5 using debuild, like the wiki says.
Today I noticed that tor crashes on HUP signal, only when the Sandbox option is on. I never had this problem.
maybe https://trac.torproject.org/projects/tor/ticket/29819 ? -- Toralf
participants (4)
-
Peter Gerber -
Roger Dingledine -
tor-relay＠riseup.net -
Toralf Förster